My home church was rebuild about 15 years ago due to the original church burning down. The new church has suffered several major events that has resulted in damage to multiple pieces of electronics. The average probably isn't one a year but there have been enough that something needs and should have been done about it.
The last few issues have been traced to thunderstorms. Church is in Eastern NC.
I completely understand lightning (if that is the true cause) is a very tricky item to deal with and even with properly installed products to mitigate the effects could have varying results.
There is CSST in the building that was not bonded during install. There is one lightning rod on steeple with a single down conductor to a ground rod. This down conductor was routed down through a chase within inches of a CSST line. Within the past year they had a contractor bond the gas system to code. The down conductor was also removed from the chase and routed externally to the ground rod. They also added two ground rods on top of existing so there is now a total of 24' of ground rod.
Since then they had another event (not surprised) that scrambled programmed devices and destroyed a projector. I am not looking for info to lead some DIY effort to address this issue. I am simply requesting a list of things to consider when trying to address this problem. What are the major things that could be contributing to the events or that could help mitigate the events?